A8501ELPTR-T Allegro Microsystems Inc, A8501ELPTR-T Datasheet - Page 2

• Manufacturer Part Number: A8501ELPTR-T
• Description: Backlight Driver For Medium Size LCDs
• Manufacturer: Allegro Microsystems Inc
• Type: Backlight, White LED, RGBr

Specifications of A8501ELPTR-T

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Automotive, Backlight
• Type - Secondary: RGB, White LED
• Frequency: 600kHz ~ 2.2MHz
• Voltage - Supply: 8 V ~ 21 V
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 100mA
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Efficiency: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1247-2

Allegro | Product | A8501 High Power WLED/RGB Driver for Medium Displays with Ou...
http://www.allegromicro.com/en/Products/Part_Numbers/8501/
The boost converter is a constant frequency, current-mode converter. Operating frequency can be set to 2 MHz in
order to avoid interference with the AM radio band. The integrated boost DMOS switch is rated for 40 V at 3.6 A.
PWM dimming allows LED currents to be controlled at up to a 1000:1 ratio. Additional 4:1 dimming can be
achieved by using the DIM pin.
The A8501 provides protection against output connector shorts through an integrated output disconnect switch. An
optional external thermistor can be used to limit LED current based on panel temperature.
The device is supplied in a surface mount, 28-pin TSSOP package (suffix LP), with exposed thermal pad for
enhanced thermal dissipation. It is lead (Pb) free with 100% matte-tin leadframe plating.
A8501ELPTR-T 28-lead TSSOP
Part Number
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product
can reasonably be expected to cause the failure of that life support device or system, or to affect the safety
or effectiveness of that device or system.
Copyright © 2008 Allegro MicroSystems, Inc.
Package Type
Compliant
RoHS
Yes
Phone: [phone]
Part Composition/
RoHS Data
view data
Complete Part Numbers
•
-40 °C to 125 °C
115 Northeast Cutoff, Worcester, MA 01606 USA
Temperature
•
Fax: [phone]
Comments
new
Contact
Marketing
Representative
Samples
Distributor Stock
Check Stock
•
Page 2 of 2
12/12/2008